I have 2020 TurboTax Deluxe, so I apologize if you don't have access to the same options in online version or different versions of TT. When I open my return, I have menu options on the left portion of the black bar at the top, "Show Topic List, Print Center, & Help Center on the right portion of the black bar, and 3 white icons on the right in the blue bar that shows Federal & State outcomes under the black bar. The first white icon is "Forms" and it allows me to go directly to any of the forms in my return to make edits manually from there. I went to the Mortgage Interest Worksheets and was amazed at the amount of information I was able to enter manually that I was not guided through when I originally was entering information for my tax return.
So, for anyone who can find a way to enter information directly into the forms, I urge you to do so for multiple 1098s before you e-file and make sure that your mortgage interest is not being limited on your schedule A for Subsequent loans that would add up to more than $750K! Apparently, the default method in Turbo Tax is to combine multiple 1098s as concurrent loans because it does not ask for the delineating details that would show the difference between concurrent and subsequent loans!
Hope this helps!
